asyncrat | 80f24ccb0e41fb077d56df233b08484d53e5303b5a2af3893086ec42d9de0b7a

Analysis

max time kernel
122s
max time network
176s
platform
windows7_x64
resource
win7v20210408
submitted
02/06/2021, 08:00

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General

Target
e88e1c20311ba191adfa455f68b48a28.exe
Size 715KB
Sample210602-bs3vlqd5fa
SHA256 80f24ccb0e41fb077d56df233b08484d53e5303b5a2af3893086ec42d9de0b7a
MD5 ceb896bded56987835dbc94f851ffd8b
SHA1 d20b1d9aec2385cc914777329d6d6d204785cbb4
SHA512 2523bb9df48c59853c81c40a43b01be8debf0e5186b1d639b8416da6238cb04b8063f16b12d02398c31da5f7e4fee535e0f74367fc627622f13ab187ba76e56b
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

kingmethod.duckdns.org:9909
kingmethod.duckdns.org:5505
kingmethod.duckdns.org:3303

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
i1ab7ini9nFb8HvpehPmapSzUZI42Qy5
anti_detection
false
autorun
false
bdos
false
delay
Default
host
kingmethod.duckdns.org
hwid
3
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
null
port
9909,5505,3303
version
0.5.7B

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/1208-86-0x000000000040C73E-mapping.dmp	asyncrat
behavioral1/memory/1208-85-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1208-87-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1944 set thread context of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
676	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1944	e88e1c20311ba191adfa455f68b48a28.exe
1944	e88e1c20311ba191adfa455f68b48a28.exe
1944	e88e1c20311ba191adfa455f68b48a28.exe
1164	powershell.exe
1556	powershell.exe
380	powershell.exe
1164	powershell.exe
1556	powershell.exe
380	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1944	e88e1c20311ba191adfa455f68b48a28.exe
Token: SeDebugPrivilege	1556	powershell.exe
Token: SeDebugPrivilege	1164	powershell.exe
Token: SeDebugPrivilege	380	powershell.exe
Token: SeDebugPrivilege	1208	e88e1c20311ba191adfa455f68b48a28.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 1164	1944	e88e1c20311ba191adfa455f68b48a28.exe	29
PID 1944 wrote to memory of 1164	1944	e88e1c20311ba191adfa455f68b48a28.exe	29
PID 1944 wrote to memory of 1164	1944	e88e1c20311ba191adfa455f68b48a28.exe	29
PID 1944 wrote to memory of 1164	1944	e88e1c20311ba191adfa455f68b48a28.exe	29
PID 1944 wrote to memory of 380	1944	e88e1c20311ba191adfa455f68b48a28.exe	31
PID 1944 wrote to memory of 380	1944	e88e1c20311ba191adfa455f68b48a28.exe	31
PID 1944 wrote to memory of 380	1944	e88e1c20311ba191adfa455f68b48a28.exe	31
PID 1944 wrote to memory of 380	1944	e88e1c20311ba191adfa455f68b48a28.exe	31
PID 1944 wrote to memory of 676	1944	e88e1c20311ba191adfa455f68b48a28.exe	33
PID 1944 wrote to memory of 676	1944	e88e1c20311ba191adfa455f68b48a28.exe	33
PID 1944 wrote to memory of 676	1944	e88e1c20311ba191adfa455f68b48a28.exe	33
PID 1944 wrote to memory of 676	1944	e88e1c20311ba191adfa455f68b48a28.exe	33
PID 1944 wrote to memory of 1556	1944	e88e1c20311ba191adfa455f68b48a28.exe	35
PID 1944 wrote to memory of 1556	1944	e88e1c20311ba191adfa455f68b48a28.exe	35
PID 1944 wrote to memory of 1556	1944	e88e1c20311ba191adfa455f68b48a28.exe	35
PID 1944 wrote to memory of 1556	1944	e88e1c20311ba191adfa455f68b48a28.exe	35
PID 1944 wrote to memory of 1404	1944	e88e1c20311ba191adfa455f68b48a28.exe	37
PID 1944 wrote to memory of 1404	1944	e88e1c20311ba191adfa455f68b48a28.exe	37
PID 1944 wrote to memory of 1404	1944	e88e1c20311ba191adfa455f68b48a28.exe	37
PID 1944 wrote to memory of 1404	1944	e88e1c20311ba191adfa455f68b48a28.exe	37
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38
PID 1944 wrote to memory of 1208	1944	e88e1c20311ba191adfa455f68b48a28.exe	38

C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe
"C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1164
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\xNznTgs.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:380
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xNznTgs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp76B6.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:676
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\xNznTgs.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1556
- C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe
  "C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe"
  2⤵
  PID:1404
- C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe
  "C:\Users\Admin\AppData\Local\Temp\e88e1c20311ba191adfa455f68b48a28.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1208

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/380-77-0x0000000004752000-0x0000000004753000-memory.dmp

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memory/380-76-0x0000000004750000-0x0000000004751000-memory.dmp

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memory/380-81-0x0000000004810000-0x0000000004811000-memory.dmp

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memory/380-72-0x0000000000B40000-0x0000000000B41000-memory.dmp

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memory/380-91-0x00000000046E0000-0x00000000046E1000-memory.dmp

Download

memory/380-95-0x00000000052C0000-0x00000000052C1000-memory.dmp

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memory/1164-66-0x0000000076691000-0x0000000076693000-memory.dmp

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memory/1164-78-0x0000000000D72000-0x0000000000D73000-memory.dmp

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memory/1164-75-0x0000000000D70000-0x0000000000D71000-memory.dmp

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memory/1208-85-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1208-98-0x00000000006C0000-0x00000000006C1000-memory.dmp

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memory/1208-87-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1556-101-0x0000000005770000-0x0000000005771000-memory.dmp

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memory/1556-90-0x00000000049B2000-0x00000000049B3000-memory.dmp

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memory/1556-122-0x0000000005690000-0x0000000005691000-memory.dmp

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memory/1556-89-0x00000000049B0000-0x00000000049B1000-memory.dmp

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memory/1556-137-0x00000000063C0000-0x00000000063C1000-memory.dmp

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memory/1556-138-0x00000000063D0000-0x00000000063D1000-memory.dmp

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memory/1556-114-0x0000000006340000-0x0000000006341000-memory.dmp

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memory/1556-107-0x0000000006220000-0x0000000006221000-memory.dmp

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memory/1556-106-0x0000000006140000-0x0000000006141000-memory.dmp

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memory/1556-120-0x000000007EF30000-0x000000007EF31000-memory.dmp

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memory/1944-59-0x00000000000E0000-0x00000000000E1000-memory.dmp

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memory/1944-64-0x0000000001EF0000-0x0000000001F17000-memory.dmp

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memory/1944-63-0x0000000004F20000-0x0000000004F90000-memory.dmp

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memory/1944-62-0x00000000005B0000-0x00000000005B1000-memory.dmp

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memory/1944-61-0x0000000000480000-0x0000000000494000-memory.dmp

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